Date: Fri, 23 Jan 1998 07:26:11 GMT From: Ywan Mason <ymasonnopsamsouth.net> Subject: Re: HELP W/ TURBO - 1986 9000 Turbo
Harri K Salminen wrote: > > : Maybe use synthetic motor oil instead of normal but still change every > : 2,500 miles. Don't use wide range oils (10W30 is best). > > What a hell youre talking about ? 10W30 oil can burn in charger and > reduce lot of chargers life. In turbo-cars should used oils that > tolerates heat. > > You should use that oil that Saab recommends to that car and I'm sure > that it is not a 10w30 TRUCK OIL !!! > > good syntetic 5w-50 or good mineral 15w-50 !!!! > I'm using those in my turbocharged Opel Ascona. > > HaSa > -- > ************************************************************ > * hksalminnopsamelsinki.fi http://www.helsinki.fi/~hksalmin * > ************************************************************ Which manual are you reading? I have worked on Saabs every day for the last 16 years for a living and the recommended oil is 10w30. I have used Mobil 1 10w30 in my 86 and it now has 240000+ miles on it with the original turbo. From my experience with turbo cars, both Saab, Toyota, and Volvo, thicker oils like xxW50 cause premature failure. 5Wxx is just too thin for my comfort. If a synthetic is used, you can get by with longer change intervals and less cool down periods. I go 5000 miles on oil changes and usually do not allow much over a 20 sec cool down after 100+mph runs. Have driven the car this way since I owned it, no problems with any engine lubrication. Coking is much more common with mineral oils and extended intervals as the additives in mineral oil break down faster. But the key is changing the oil frequently and using a high quality filter.
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